<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>catch方法</title>
  </head>
  <body>
    <script>
      const p = new Promise((resolve, reject) => {
        //设置 p 对象的状态为失败, 并设置失败的值
        reject('出错啦!')
      })

      p.then(
        function (value) {},
        function (reason) {
          console.error(reason)
        }
      )

      p.catch(function (reason) {
        console.warn(reason)
      })
    </script>
  </body>
</html>
